The KF9108 is a constant frequency, 6-pin SOT23 current mode step-up converter intended for small, low power applications. The KF9108 switches at 1.2MHz and allows the use of tiny, low cost capacitors and inductors 2mm or less in height. Internal soft-start results in small inrush current and extends battery life.
The KF9108 features automatic shifting to pulse frequency modulation mode at light loads. The KF9108 includes under-voltage lockout, current limiting, and thermal overload protection to prevent damage in the event of an output overload. The KF9108 is available in a small 6-pin SOT-23 package.
Features
Integrated 80mQ Power MOSFET
2V to 24V Input Voltage
1.2MHz Fixed Switching Frequency
Internal 4A Switch Current Limit
Adjustable Output Voltage
Internal Compensation
Up to 28V Output Voltage
Automatic Pulse Frequency Modulation Mode at Light Loads
up to 93% Eficiency
Available in a 6-Pin SOT23-6 Package
Application
Battery-Powered Equipment
Set-Top Boxed
LCD Bais Supply
DSL and Cable Modems and Routers
Networking cards powered from PCI or PCI express slots